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700/900 Series General Forum for the Volvo 740, 760, 780, 940, 960 & S/V90 cars |
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740 head gasgetViews : 392 Replies : 9Users Viewing This Thread : |
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Apr 19th, 2020, 21:21 | #1 |
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740 head gasget
hi can you give me a link on how to replace a 740 b230e head gasget please.ive been looking on the forum but cant seem to find thanks
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Apr 19th, 2020, 21:46 | #2 |
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order the correct gasket kit and new cylinder head bolts
receive the kit and check it is the correct kit curse the foul weather and drink beer until rain stops remove inlet and exhaust manifolds. remove cam cover remove timing belt cover set engine to tdc, #1 remove timing belt remove head bolts lift head off remove old gasket inspect your head - whistle sharply between your teeth as you assess whether it needs to be skimmed now inspect the cylinder head. Same whistling noise can be used send it to be skimmed anyway (the cylinder head, not your head) clean all the old gunk off the top of the block (engine block, not your block) check the cylinder bores while you are in there. Be amazed at the lack of wear refer to Haynes manual for reassembly statement. Its a pretty straightforward mechanical process with very little technical skill required. You will need a torque wrench, but that should be the only specialist tool needed. If the head has ANY sign of distortion, just get it machined. Even if you are unsure, send it to be machined. It is not difficult or expensive in the long term and will assure a good fit, finish and outcome. Last edited by aardvarkash10; Apr 19th, 2020 at 21:51. |
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Apr 19th, 2020, 22:13 | #3 |
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head gasget 740
hi you make it sound so simple .video would help lots like changing the timing belt when its of. water pump and is it the same engine as a 240.only lots of videos on 240 do i take the radiator of do i drop the oil .lots of things to think about.
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Apr 19th, 2020, 22:56 | #4 |
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Mark everything as it comes apart, take photos. No, the radiator stays in place, no you don't need ot drop out the oil. You will need to drop out the coolant and renew it on reassembly.
It is as simple as I describe. The engine itself is very basic and has no nasty tricks or catches. If you follow a logical process its just like a piece of IKEA furniture. The engine is effectively the same in the 240, 740 and 940. Any of the B230x series engines is almost identical in respect of this job. There is plenty of info on timing belt changes all over the interweb. It would be advisable to put on a new belt if you don't know what the service life of the current one is. Do the tensioner at the same time. Some people advocate for changing the water pump (me) others advocate to leave well enough alone (pretty much everyone else!). I would also replace the thermostat because you are in there anyway and its cheap. |
Apr 19th, 2020, 23:58 | #5 |
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head gasget 740
thats great news thanks.just changed the oil seal on the rocker as its not good and lots of cream on the cap.but no sign on the dip stick and i will do a head gasget gas test just to make shore its gone .cherrs for the info and will be in touch
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Apr 20th, 2020, 00:52 | #6 |
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if the head gasket is gone you will be losing water in the radiator.
Cream on the oil cap is also a sign of an engine that has done a LOT of very short trips. Condensation builds up in the crankcase and turns into cream at the top of the engine. If you are not losing water in the cooling system, I would suggest that you take the car for a damn good thrashing to heat it up and evaporate the water in the oil. Then do an oil change including the filter. |
Apr 20th, 2020, 09:05 | #7 |
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I would agree with the vast majority of Aardvarkash10's posts -the exception being that the tensioner only needs replacing if it rumbles or feels rough to the touch.
On the B200/230 it's a lot easier to do the timing belt if you have the crankshaft locking tool, since the pulley securing bolt is rather tight. I have one that I lend out if you do have to go down that route.
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Apr 20th, 2020, 21:56 | #8 |
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740 head gasget
thanks loki ill take you up on that offer.if i need to change the head.but yes im hoping its just mosture in the oil and yes its been sitting for a long time now as its been a working project for ten years and slowly coming together.but ive been running the engine every now and then stop starting .also had to put meths in with the fuel tank to kill the moisture .dip stick is nice and clean as with the radiator tank.so ill change the oil and filter first i think and see how it goes.just a shame its sorn and no mot as i would take here for a good run if that was the case.cherrs
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Apr 20th, 2020, 22:10 | #9 | |
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Apr 20th, 2020, 23:15 | #10 |
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head gasget
hi griston.you have just given me a hole lot of confidence mate.started to look at videos on how to change the head.lol and will take that crape oil out as a first.thanks
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